AT: Add jetpack_sync_send_data_query_args

[artpi]

Adds a filter for query_args in Jetpack_Sync_Actions::send_data
We need this filter for changing timeout property while fast-Syncing big sites.

This is not a priority, we don't use it now, but our current solution is clunky.

CC @gravityrail @lamosty

[lamosty]

Nice work @artpi.

Don't forget to add proper filters/actions docblocks like we do on other places throughout the Jetpack codebase. :)

[jeherve]

As @lamosty suggested, you'll need to add a docblock to document that filter and make our parser and documentation happy. Here is an example:

jetpack/sync/class.jetpack-sync-actions.php

Lines 40 to 51 in 2e275df

	/**
	* Fires on every request before default loading sync listener code.
	* Return false to not load sync listener code that monitors common
	* WP actions to be serialized.
	*
	* By default this returns true for cron jobs, non-GET-requests, or requests where the
	* user is logged-in.
	*
	* @since 4.2.0
	*
	* @param bool should we load sync listener code for this request
	*/

You can use 4.7.0 for the @since version.

I would also recommend having a more detailed commit message in the future, as mentioned in PCYsg-1lS-p2

Thank you!

[gravityrail]

@artpi @jeherve - I added the docblock

[jeherve]

LGTM! 🚢